3856749 has 12 divisors (see below), whose sum is σ = 5569056. Its totient is φ = 2373072.

The previous prime is 3856733. The next prime is 3856751. The reversal of 3856749 is 9476583.

It is a happy number.

It is not a de Polignac number, because 3856749 - 2⁴ = 3856733 is a prime.

It is an alternating number because its digits alternate between odd and even.

3856749 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3856749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3856729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3297 + ... + 4310.

It is an arithmetic number, because the mean of its divisors is an integer number (464088).

Almost surely, 2^3856749 is an apocalyptic number.

3856749 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3856749 is a deficient number, since it is larger than the sum of its proper divisors (1712307).

3856749 is a wasteful number, since it uses less digits than its factorization.

3856749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7636 (or 7623 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 3856749 is about 1963.8607384435. The cubic root of 3856749 is about 156.8220494511.

The spelling of 3856749 in words is "three million, eight hundred fifty-six thousand, seven hundred forty-nine".